Publications by Rolf Wüthrich

Toward a better understanding of glass gravity-feed micro-hole drilling with electrochemical discharges

Spark-assisted chemical engraving (SACE) is a flexible, simple and inexpensive method for machining electrically non-conductive materials. SACE is particularly interesting because of the high drilling speed that can be achieved compared to other micromachi ...

Institute of Physics2009

Estimation of the effectiveness factor of an outer-sphere redox couple (Fe3+/Fe2+) using rotating disk Ti/IrO2 electrodes of different loading

Rolf Wüthrich, Christos Comninellis, György Foti, Erika Herrera Calderon

Springer Netherlands2009

Effectiveness factor of fast (Fe3+/Fe2+), moderate (Cl2/Cl-) and slow (O2/H2O) redox couples using IrO2 based electrodes of different loading

Rolf Wüthrich, Christos Comninellis, György Foti, Erika Herrera Calderon

Springer Netherlands2009

Control of a Haptic Interface and a Micromachining Setup with an Open Source Real-Time System

Rolf Wüthrich, Hannes Bleuler, Pascal Maillard, Ulrich Spälter, Lionel Flaction, Evren Samur

Open source software have evolved into powerful tools for real-time control of mechatronic systems. They are of interest for academic purposes, as they promise high flexibility at low cost. In this paper, we investigate the performance of an open source co ...

2007

Effect of microstructure on the electrochemical behavior of Pt/YSZ electrodes

Rolf Wüthrich, Christos Comninellis, György Foti, Arnaud Jaccoud

Springer, Springer-Verlag2007

The current signal in Spark Assisted Chemical Engraving (SACE), what does it tell us ?

Rolf Wüthrich, Hannes Bleuler, Ulrich Spälter

Spark-assisted chemical engraving (SACE) is a promising micro-machining technology for the low-cost machining of holes and channels in non-conducting materials, such as glass and some ceramics. Despite the complexity of SACE due to the interdependency of t ...

2006

A systematic characterization method for gravity-feed micro-hole drilling in glass with spark assisted chemical engraving (SACE)

Rolf Wüthrich, Hannes Bleuler, Ulrich Spälter

Gravity-feed drilling is the most commonly used method for micro-hole drilling in glass with spark assisted chemical engraving (SACE). This paper proposes a method allowing the systematic characterization of this drilling method. The influences of voltage, ...

2006

The gas film in Spark Assisted Chemical Engraving (SACE) - A key element for micro-machining applications

Rolf Wüthrich

Machining of various electrically non-conductive materials is possible with Spark Assisted Chemical Engraving (SACE). Even though this technology presents several interesting properties like simplicity, flexibility and the possibility to obtain very smooth ...

2006

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Rolf Wüthrich, Christos Comninellis, Agnieszka Kapalka

A new, low production cost, technique for the preparation of boron-doped diamond electrodes (BDD) is presented. The technique is based on mechanical implantation of BDD particles into a titanium substrate. The electrochemical characterization of low covera ...

Elsevier2006

Spark Assisted Chemical Engraving (SACE) machining – a versatile alternative micro-machining technology

Rolf Wüthrich, Hannes Bleuler

2006

Material removal rate in Spark Assisted Chemical Engraving (SACE) machining – Limiting factors

Rolf Wüthrich, Hannes Bleuler, Ulrich Spälter

2006

Bubble evolution on a vertical electrode under extreme current densities

Rolf Wüthrich, Hannes Bleuler, Christos Comninellis

Under gas evolution, the current voltage characteristics of an electrochemical cell are strongly affected by the presence of growing bubbles. At high current densities, the evolution of the bubbles becomes the rate limiting step of the electrochemical proc ...

2005

Physical principles and miniaturization of Spark Assisted Chemical Engraving (SACE)

Rolf Wüthrich, Hannes Bleuler, Ashwin Lal

Spark assisted chemical engraving (SACE) is an unconventional micromachining technology based on electrochemical discharge phenomena for glass and various ceramics. The limits of SACE with respect to small dimensions in the particular case of glass are exp ...

2005

Spark assisted chemical engraving (SACE) in microfactory

Rolf Wüthrich, Hannes Bleuler

Spark assisted chemical engraving (SACE) is a method for 3D microstructuring of glass or other non-conductive materials with high aspect ratio and smooth surface quality. It is applicable for rapid prototyping of microfluidic devices, for MEMS interfacing ...

2005

Machining of non-conducting materials using electrochemical discharge phenomenon – An overview

Rolf Wüthrich, Valia Fascio

Machining with electrochemical discharges is an unconventional technology able to machine several electrically non-conductive materials like glass or some ceramics. After almost 40 years of its first mention in literature, this technology remains an academ ...

2005

Rolf Wüthrich

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Toward a better understanding of glass gravity-feed micro-hole drilling with electrochemical discharges

Estimation of the effectiveness factor of an outer-sphere redox couple (Fe3+/Fe2+) using rotating disk Ti/IrO2 electrodes of different loading

Effectiveness factor of fast (Fe3+/Fe2+), moderate (Cl2/Cl-) and slow (O2/H2O) redox couples using IrO2 based electrodes of different loading

Control of a Haptic Interface and a Micromachining Setup with an Open Source Real-Time System

Effect of microstructure on the electrochemical behavior of Pt/YSZ electrodes

The current signal in Spark Assisted Chemical Engraving (SACE), what does it tell us ?

A systematic characterization method for gravity-feed micro-hole drilling in glass with spark assisted chemical engraving (SACE)

The gas film in Spark Assisted Chemical Engraving (SACE) - A key element for micro-machining applications

Electrochemical characterization of mechanically implanted boron doped diamond electrodes MI-BDD

Spark Assisted Chemical Engraving (SACE) machining – a versatile alternative micro-machining technology

Material removal rate in Spark Assisted Chemical Engraving (SACE) machining – Limiting factors

Bubble evolution on a vertical electrode under extreme current densities

Physical principles and miniaturization of Spark Assisted Chemical Engraving (SACE)

Spark assisted chemical engraving (SACE) in microfactory

Machining of non-conducting materials using electrochemical discharge phenomenon – An overview

Spark Assisted Chemical Engraving (SACE) machining – Haptic device for the operator

Micro-usinage de verre avec décharges électrochimiques

Study of DSA deactivation

Electrochemical characterization of dimensionally stable anodes (DSA®)

Diphasic Electrolysis Process Modelling for a Vertical Electrode